Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield

Currently applied fisheries models and stock assessments rely on the assumption that density-dependent regulation only affects processes early in life, as described by stock–recruitment relationships. However, many fish stocks also experience density-dependent processes late in life, such as density...

Full description

Bibliographic Details
Published in:Marine Biology
Main Authors: van Gemert, Rob, Andersen, Ken Haste
Format: Article in Journal/Newspaper
Language:English
Published: 2018
Subjects:
Online Access:https://orbit.dtu.dk/en/publications/4bf15511-1cec-458d-98b4-5666e28f0ad2
https://doi.org/10.1093/icesjms/fsx236/4817093
https://backend.orbit.dtu.dk/ws/files/185298034/fsx236.pdf
id ftdtupubl:oai:pure.atira.dk:publications/4bf15511-1cec-458d-98b4-5666e28f0ad2
record_format openpolar
spelling ftdtupubl:oai:pure.atira.dk:publications/4bf15511-1cec-458d-98b4-5666e28f0ad2 2024-06-23T07:55:28+00:00 Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield van Gemert, Rob Andersen, Ken Haste 2018 application/pdf https://orbit.dtu.dk/en/publications/4bf15511-1cec-458d-98b4-5666e28f0ad2 https://doi.org/10.1093/icesjms/fsx236/4817093 https://backend.orbit.dtu.dk/ws/files/185298034/fsx236.pdf eng eng https://orbit.dtu.dk/en/publications/4bf15511-1cec-458d-98b4-5666e28f0ad2 info:eu-repo/semantics/openAccess van Gemert , R & Andersen , K H 2018 , ' Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield ' , ICES Journal of Marine Science , vol. 75 , no. 4 , pp. 1296–1305 . https://doi.org/10.1093/icesjms/fsx236/4817093 Density dependence Maximum sustainable yield Selective fishing Size spectrum /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2018 ftdtupubl https://doi.org/10.1093/icesjms/fsx236/4817093 2024-06-11T14:47:43Z Currently applied fisheries models and stock assessments rely on the assumption that density-dependent regulation only affects processes early in life, as described by stock–recruitment relationships. However, many fish stocks also experience density-dependent processes late in life, such as density-dependent adult growth. Theoretical studies have found that, for stocks which experience strong late-in-life density dependence, maximum sustainable yield (MSY) is obtained with a small fishery size-at-entry that also targets juveniles. This goes against common fisheries advice, which dictates that primarily adults should be fished. This study aims to examine whether the strength of density-dependent growth in actual fish stocks is sufficiently strong to reduce optimal fishery size-at-entry to below size-at-maturity. A size-structured model is fitted to three stocks that have shown indications of late-in-life density-dependent growth: North Sea plaice (Pleuronectes platessa), Northeast Atlantic (NEA) mackerel (Scomber scombrus), and Baltic sprat (Sprattus sprattus balticus). For all stocks, the model predicts exploitation at MSY with a large size-at-entry into the fishery, indicating that late-in-life density dependence in fish stocks is generally not strong enough to warrant the targeting of juveniles. This result lends credibility to the practise of predominantly targeting adults in spite of the presence of late-in-life density-dependent growth. Article in Journal/Newspaper Northeast Atlantic Technical University of Denmark: DTU Orbit Marine Biology 164 10
institution Open Polar
collection Technical University of Denmark: DTU Orbit
op_collection_id ftdtupubl
language English
topic Density dependence
Maximum sustainable yield
Selective fishing
Size spectrum
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water
name=SDG 14 - Life Below Water
spellingShingle Density dependence
Maximum sustainable yield
Selective fishing
Size spectrum
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water
name=SDG 14 - Life Below Water
van Gemert, Rob
Andersen, Ken Haste
Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield
topic_facet Density dependence
Maximum sustainable yield
Selective fishing
Size spectrum
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water
name=SDG 14 - Life Below Water
description Currently applied fisheries models and stock assessments rely on the assumption that density-dependent regulation only affects processes early in life, as described by stock–recruitment relationships. However, many fish stocks also experience density-dependent processes late in life, such as density-dependent adult growth. Theoretical studies have found that, for stocks which experience strong late-in-life density dependence, maximum sustainable yield (MSY) is obtained with a small fishery size-at-entry that also targets juveniles. This goes against common fisheries advice, which dictates that primarily adults should be fished. This study aims to examine whether the strength of density-dependent growth in actual fish stocks is sufficiently strong to reduce optimal fishery size-at-entry to below size-at-maturity. A size-structured model is fitted to three stocks that have shown indications of late-in-life density-dependent growth: North Sea plaice (Pleuronectes platessa), Northeast Atlantic (NEA) mackerel (Scomber scombrus), and Baltic sprat (Sprattus sprattus balticus). For all stocks, the model predicts exploitation at MSY with a large size-at-entry into the fishery, indicating that late-in-life density dependence in fish stocks is generally not strong enough to warrant the targeting of juveniles. This result lends credibility to the practise of predominantly targeting adults in spite of the presence of late-in-life density-dependent growth.
format Article in Journal/Newspaper
author van Gemert, Rob
Andersen, Ken Haste
author_facet van Gemert, Rob
Andersen, Ken Haste
author_sort van Gemert, Rob
title Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield
title_short Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield
title_full Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield
title_fullStr Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield
title_full_unstemmed Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield
title_sort implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield
publishDate 2018
url https://orbit.dtu.dk/en/publications/4bf15511-1cec-458d-98b4-5666e28f0ad2
https://doi.org/10.1093/icesjms/fsx236/4817093
https://backend.orbit.dtu.dk/ws/files/185298034/fsx236.pdf
genre Northeast Atlantic
genre_facet Northeast Atlantic
op_source van Gemert , R & Andersen , K H 2018 , ' Implications of late-in-life density-dependent growth for fishery size-at-entry leading to maximum sustainable yield ' , ICES Journal of Marine Science , vol. 75 , no. 4 , pp. 1296–1305 . https://doi.org/10.1093/icesjms/fsx236/4817093
op_relation https://orbit.dtu.dk/en/publications/4bf15511-1cec-458d-98b4-5666e28f0ad2
op_rights info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.1093/icesjms/fsx236/4817093
container_title Marine Biology
container_volume 164
container_issue 10
_version_ 1802648082423218176